Improvement in crozing-machines



vPATENT OFFICE.

WILLIAM E. MIDDLETON, oEoLEvELAND, oEIo.

IMPROVEMENT IN CRZlNGvMAHlNES.

Speeication forming part of Letters Patent No. 115,974, dated J une 13,1871.

To all whom it may concern:

Be it known that I, WILLIAM R. MIDDLE- TON, of Cleveland, in the countyof Cuyahoga and State of Ohio, have invented a certain new and ImprovedBarrel-Croze; and I do hereby declare that the following is a full,

clear, and complete description of the same, reference being had to theaccompanying drawing making part of this specification, in whichvFigures l and 2 are edge views of the croze. Figs. 3 and 4 are sideviews.

Like letters of reference denote like parts in the different views.

rlhe nature of this invention relates to a device Ior cutting the groovein the chine of barrels for the reception and retention of the headsthereof, the same being an improvement of a former invention, forming apart of a barreLmachine, for which an application for Letters Patent wastiled March 9, 1871.

In the drawing, Fig. 1, A represents the head of the croze, in the faceof whichlis cut a deep dovetailed groove, B, Fig. 2. In said groove isfitted/a pair of slides, C C', Fig. 4, and which are made to slidetherein in opposite directions in respect to each other by means of awedge, indicated bythe dotted lines a, Fig. 1, an end view of which isshown in Fig. 4, in which it will be seen that from one edge of each ofthe sides of the wedge projects a flange or rib, c, which is made to:tit and slide in corresponding notches cut in the edge of the slides,as shown in said Fi 4.

Igt will be observed that one side of each of the notches is much widerthan the other, so that it reaches back upon the inclined planes of thewedge, and whereby said slides are operated, as presently shown.

On the outer end of the slide C is secured the crozing-iron F, Fig. 4,whereas on the outer end of the slide (Ii-fis secured the trimmer Gr.

The practical operation of this croze is as follows: It is attached tothe machine above referred to, said machine being constructed in partfor carrying and operating the croze and in part for holding or clampingthe barrel -while being operated upon. While the head of the croze isbeing made to revolve it is introduced into the end of the barrel to thebase of the chine. The slides C C are then forced outwardly, asindicated by the dotted lines c, Fig. 4, by the wedge, it being actuatedby the stem H, to which it is attached for beingperated by theappliances of the machine. The crozing-iron F by this means cuts intothe end ofthe barrel, forming a groove for the heads. The edges of thegroove are trimmed and slightly rounded by the trimmer G, which followsimmediately after the crozing-iron, thereby iinishing the groove. L

The operation of the machine is such as to draw the wedge back into thehead immediately on cutting the groove, thereby allowing the slides tobe drawn back by the A springs I and the grooving-iron to be withdrawnfrom the groove, thereby allowing the head or croze to pass out from thebarrel.

The crozing-head used in the machine above alluded to is so constructedthat each of the slides reaches only to the center of the head, fromwhich is made to project a wedge for forcing them outwardly-that is tosay, the wedge is between the two inner ends of the slides. Theobjection to this way of constructing the head and slides is that theslides are not readily brought back after being pro, jected for cutting'the grooves, in consequence of the centrifugal force being so great asto overcome the resiliency of the springs used for drawing back theslides; hence the head is found, by experience, to be impracticable, forthe crozing-irons are not withdrawn from the groove, and, therefore, thehead cannot be removed from the barrel. In order to remedy :this defectof the machine, I have made slides to extend across the entire diameterof the head, so that the weightof the slide on one side of the axialcenter will` counterbalance that on the other; hence the centrifugal:force4 exerted upon'the slides will be at each end as in oppositedirections, which The Wedge a, when constructed with :t will, therefore,not prevent them from being ange or rib, c, as arranged to operate incomdrawn back by the springs used in connection bination with the slidesC C', iu the manner therewith for that purpose. and for the purpose setforth.

WILLIAM R. MIDDLETON.

0mm' Witnesses: What I claim as my invention7 and desire to W. H.BURRIDGE, secure by Letters Patent, is J. H. BURRIDGE.

